High Production of Thermostable β-Galactosidase of Bacillus stearothermophilus in Bacillus subtilis
Haruhisa Hirata, Seiji Negoro, Hirosuke Okada
Abstract
Haruhisa Hirata, Seiji Negoro, Hirosuke Okada
Abstract
By cloning the beta-galactosidase gene of Bacillus stearothermophilus IAM11001 (ATCC 8005) into Bacillus subtilis, enzyme production was enhanced 50 times. beta-Galactosidase could be purified to 80% homogeneity by incubating the cell extract of B. subtilis at 70 degrees C for 15 min, followed by centrifugation to remove the denatured proteins. Because of its heat stability and ease of production, beta-galactosidase is suitable for application in industrial processes.
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By cloning the beta-galactosidase gene of Bacillus stearothermophilus IAM11001 (ATCC 8005) into Bacillus subtilis, enzyme production was enhanced 50 times. beta-Galactosidase could be purified to 80% homogeneity by incubating the cell extract of B. subtilis at 70 degrees C for 15 min, followed by centrifugation to remove the denatured proteins. Because of its heat stability and ease of production, beta-galactosidase is suitable for application in industrial processes.
Key concepts: Bacillus subtilis, Bacillaceae, Bacillales, Bacillus (shape), Enzyme, Centrifugation, Biology, Biochemistry